Question #6132b

1 Answer
sjc
Jan 27, 2018

#-13#

Explanation:

for two vectors
#veca= < a_1,a_2,a_3>, vecb=< b_1,b_2,b_3 >#

#veca*vecb=a_1b_1+a_2b_2+a_3b_3#

we are given

#vecv=<6,7,-3>#

#vecw=<-7,5,2>#

#:.vecv*vecw=<6,7,-3>*<-7,5,2>#

#=6xx-7+7xx5+ -3xx2#

#=-42+35+ -6#

#=-13#

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